Abstract
A study and comparison of three algorithms for an optical material image analysis aiming at a determination of the laser-induced damage threshold were conducted. The first algorithm is based on the image integral-representation principle. It makes it possible to compare the total brightness of the images containing a laser-damaged area and an undamaged background area. The second algorithm is based on a Canny edge detector with a subsequent damage contour perimeter calculation. It includes several image processing steps to enhance the image contrast and sharpness in the damaged area compared to the background. The third algorithm is based on a determination of the Minkowski dimension of the detected damage contour.
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